On March 10, 1996 about 1350 eastern standard time a Cessna 152U, N68129, collided with trees and then the ground in Rincon, Georgia. The flight was conducted under the provisions of Title 14 CFR part 91, and instrument flight rules. Visual meteorological conditions prevailed during the personal flight, and an instrument flight plan was filed. The airline transport pilot and his passenger were not injured; the airplane was substantially damaged. The flight departed Tullahoma, Tennessee, on the same day, at an undetermined time. The flight was cleared to land at Savannah International Airport when the engine began to run roughly. The pilot selected a forced landing site. The pilot reported that the mixture was full rich and carburetor heat was applied at the time of the loss of engine power. During the emergency descent the airplane collided with trees of small diameter. As the airplane rolled out, the nose wheel hit a mound of dirt and nosed over. The airplane came to rest inverted, and the pilot and passenger exited the airplane without injury. A post accident investigation of the wreckage found that there was no fuel in the aircraft fuel tanks or any fuel or fuel residue on the ground at the accident site. A post accident engine run found the engine to be fully operational. The pilot reported his planned flight time enroute to his destination to be three hours and seventeen minutes at 75% power setting. According to the Cessna 152 flight manual, the maximum endurance at 75% power is three hours and five minutes.